Oerlinghausen is a city in the Lippe district of North Rhine-Westphalia, Germany located between Bielefeld and Detmold in the Teutoburger Wald. It has c. 16,700 inhabitants (2013).
Geographically, Oerlinghausen is situated on top of the Teutoburger Wald hills. Oerlinghausen's highest point is the Tönsberg with 334 meters. The flatlands of northern Germany start some 40 km north of Oerlinghausen. There are beautiful hiking routes along the hill chain which stretches 80 km in east-west direction. To the south of the hills are large sand areas originating from melting glaciers during past ice ages. Although not high, the hills are steep in many places and almost completely covered by forest.
First mentioned in documents in 1036, the town became a city in 1926 by authority of the Land of Lippe. In 1969 the city was expanded with the addition of Helpup, Währentrup and Lipperreihe as part of the "Gebietsreform" movement.
Oerlinghausen is home to an airfield which is one of Europe's largest gliding centres as well as the well known Archäologisches Freilichtmuseum Oerlinghausen (archaeological open-air museum) featuring reconstructions of a variety of dwellings spanning from 10,000 BC to 1000 AD.